package com.hmdp.utils;

import lombok.RequiredArgsConstructor;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

@RequiredArgsConstructor
@Component
public class RedisIdWorker {

    private static final long BEGIN_TIMESTAMP = 1735689600L;
    private static final int COUNT_BITS = 32;

    private final RedisTemplate<String, Object> redisTemplate;

    public long nextId(String keyPrefix) {

        // 生成时间戳
        LocalDateTime now = LocalDateTime.now();
        long nowSecond = now.toEpochSecond(ZoneOffset.UTC);
        long timestamp = nowSecond - BEGIN_TIMESTAMP;

        // 生成序列号
        String date = now.format(DateTimeFormatter.ofPattern("yyyy:MM:dd"));
        long count = redisTemplate.opsForValue().increment("icr:" + keyPrefix + ":" + date);

        // 拼接并返回
        return timestamp << COUNT_BITS | count;
    }

    public static void main(String[] args) {
        LocalDateTime time = LocalDateTime.of(2025, 1, 1, 0, 0, 0);
        long second = time.toEpochSecond(ZoneOffset.UTC);
        System.out.println(second);
    }
}
